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Controllable mesostructure, magnetic properties of soft magnetic Fe-Ni-Si by using selective laser melting from nickel coated high silicon steel powder

Article dans une revue avec comité de lecture
Author
KANG, Nan
196891 State Key Laboratory of Solidification Processing
GUITTONNEAU, Fabrice
LIAO, Hanlin
496957 Laboratoire Interdisciplinaire Carnot de Bourgogne [ICB]
FU, Y.
301440 Dalian Maritime University
AUBRY, E.
502395 Nipson Technology
ccEL MANSORI, Mohamed
211915 Mechanics surfaces and materials processing [MSMP]

URI
http://hdl.handle.net/10985/17647
DOI
10.1016/j.apsusc.2018.06.045
Date
2018
Journal
Applied Surface Science

Abstract

Fe-Ni-Si soft magnetic parts, using Ni coated high silicon steel powder, were manufactured by selective laser melting process. The type of defect changes from porosity to cracks and the relative density increases, from 50% to 99%, with the decreasing laser scanning speed. The microstructural analyses indicate that the low laser scanning speed fully melted the nickel coating and high-silicon steel core. The EBSD study showed that the separated island and lamellar mesostructures appeared on the top and side view respectively. Moreover, no apparent texture were observed. The magnetization saturation of SLM processed sample decreased, as the laser scanning speed was increased. Consequently, the magnetic properties of SLM processed Fe-Ni-Si alloy also showed anisotropic feature in building and scanning directions, which can be attributed to their different mesostructure.

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